Electric contact plug



Nov. 15, 1938. c, H LE 2,137,162

ELECTRIC CONTACT PLUG I Filed June 3, 1957 ('kdrlasljfzie Patented Nov. 15, 1938 UNI'TED STATES PATENT OFFICE 2,127,162 ELECTRIC CONTACT PLUG Charles L. Hile, Louisville, Ky.

Application June 3, 1937, Serial No. 146,280 2 Claims. (01. 173-322) This invention relates to certain new and useful improvements in electric contact plugs.

The primary object of the invention is to provide an electric contact plug having a device associated therewith for relieving pulling strains on p the conductor wires and intended for use in lieu of the usual plug puller.

A further object of the invention is to provide an electric contact plug of the foregoing character 1 wherein a strain reliever for the conductor wires in the form of a barrel or tube extends transversely of and is swiveled in the inner end of the contact plug and through'which barrel or tube, the conductor wires from the terminal within the plug extend in opposite directions for increasing frictional contact between the conductor wires within the barrel or tube for relieving strain on the conductor wires at their points of connection with the terminals within the plug during the pulling of the plug.

With the above and other objects in view that will become apparent as the nature of the invention is better understood, the same consists in the novel form, combination and arrangement of parts hereinafter more fully described, shown in the accompanying drawing and claimed.

In the drawing:-

Figure 1 is a plan view of the electric contact plug constructed in accordance with the present invention and showing a barrel or tubular member extending transversely of the inner end'of the plug and through which the conductor wires from the plug extend in opposite directions Figure 2 is a side elevational view; 7

Figure 3 is an inside face view of one of the contact plug sections with the barrel or tube guide for the conductor wires shown in section;

Figure 4 is an inner end elevational view of the pl Figure 5 is a detail sectional view taken on line 5-5 of Figure 1, showing the strap support for the barrel or tube swiveled in the inner end of the contact plug; and

Figure 6 is a perspective view of the conductor wire barrel or tubular member with the holder therefor.

The electric contact plug is of the usual type including a pair of mating sections I0 housing the terminals and inner ends of the conductor wires, the inner face of each section III being recessed, notched and grooved for seating the terminals II that have the inner ends of conductor wires I2 and I3 anchored to the terminals II as at I4. The opposed faces of the inner ends of the plug sections III are provided with an annular groove toward each other and reversely curved to provide I a pair of ribs I9 that are seated in the annular groove I5 in the plug sections II) to swivel therein, the tubular member I! extending transversely of the inner end of the contact plug. As shown more clearly in Figures 1 and 3, the conductor wire I2 extending from the contact plug is passed in one direction as shown at 20 through the tubular member I'I while the other contact wire I 3 extending from the plug is passed in a reverse direction as shown at 2I through the tubular member I1 with the two portions 20 and 2I of the conductor wires I2 and I3 frictionally confined within the tubular member. The tubular member II extends transversely of the inner end of the contact plug and if desired may be used as a plug puller, but pulling strain on the inner ends of the conductor wires I2 and I3 at their points of connections I4 with the terminals II is relieved when the extended ends of the conductor wires I2 and I3 are used as a pulling device in View of the reverse passage of the conductor wires through the tubular member I! with the frictional engagement between the portions 20 and 2| of the conductor wires and frictional engagement between the conductor wires and tubular member.

From the above detailed description of the invention, it is believed that the construction and operation thereof will at once be apparent and while there is herein shown and described the preferred embodiment of the present invention, it is nevertheless to be understood that minor changes may be made therein without departing from the spirit and scope of the invention as claimed.

1. In an electric contact plug of the character described, a plug body formed of mating sections, each section having a semi-circular groove mating with the groove of the other section to form an annular groove when the sections are assembled, conductor wires extending from the plug body, means for relieving pulling strains on the conductor wires including a tubular member an annular groove when the sections are assembled, conductor wires extending from the plug body, means for relieving pulling strains on the conductor wires including a tubular member extending transversely of the end of the plug body from. which the conductor wires extend and externally thereof and a carrier for the tubular member including a strap surrounding the tubular member and having its ends directed toward each other and said ends being located in the annular groove.

CHARLES L. HILE. 

